Gbaiw-sbpabatob



'GA UNTKL HINMAN.

Grain Separator.

' Patented March 19, 1 861.

' nor N. PETERS. Phnlo-Lilhognpher. Washinglqn, 0.0.

\VM. E. GAUNT AND BOTSFORD B. HINMAN, OE KEOKUK, IOVi A.

GRAIN-SEPARATOR.

Specification of Letters Patent No. 31,711, dated March 19, 186 1.

To all whom it may concern:

Be it known that we, VAL-E. GAUNT and Bo'rsroRD B. HINMAN, of Keokuk, Lee county, State of Iowa, have invented a new and useful Improvement in- Grain-Separa,

tors for the Purpose of Cleaning Vheat and other Grain from any Foreign Substance; and we hereby declare that the following is a full and exact description, to wit:

The nature of our invention consists in the arrangement of a compound adjustable and dividing screen by which any desired quantity of grainlnay be saved or rejected; the object being to save that part which is perfectly clean and reject and return for recleaning that which requires it.

The practical operation of the screens is as follows. 1st, the upper or adjustable screen extends as far back as there is a perfect separation of the grain from the foreign substances which point of separation depends on the amount of feed and draft from which follows the necessity of having the screen adjustable; 2d, the lower screen is intended to receive and convey back that part of the grain which passes through the zinc sieves back of the upper screen and in which there has not been a perfect separation.

or depression.

To enable others skilled in the art to make and use our invention, we will proceed to describe its construction and operation.

The grooves A, in which the zinc sieves B, rest are made in the form of an acute angle being fitted to the frame of the sieve atthe'head and spreading as it runs back so as to give room for the desired elevation e elevate or depress the sieves by the use of the eccentric C, on rod D.

Our adjustable screen E is made of Wire and fitted free in groove F, so that it may be moved back and forth at will, the lower screen made and fitted in like manner in groove G. 7

What we claim as new and desire to secure by Letters Patent is The adjustable screen E, in combination with the adjustable sieve B, and the stationary screen G, when arranged and operating substantially as set forth.

\VM. E. GAUNT. BOTSFORD B. HINMAN.

Witnesses:

EDMUND JAEGER, WVM. W. BELKNAI 

